Coal-gas carburetor



DW. 25 w23,

H. swAmz COAL GAS CARBURETOR Original Filed July 20. 1921 FJG J.l

Patented Der. 25, lQZS.

n rare lll einen arent erica.

COAL-GAS CARBURETOR.

Application led July 20, 1921, SeriaI No. 468,127. Renewed. November 17, 1923.

To all 'whom t may concern Be it known that I, HENRY SWARTZ, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a certain new and useful Improvement in Coal-Gas Carburetors, whereof the following is a specification, reference being had to the accompanying drawing.

My invention relates to devices designed to mix atmospheric air with the gaseous primary products of combustion from a coal lire, to facilitate the complete combustion of such products and consequent economy of fuel.

The form of my invention hereinafter described is adapted as an accessoryat-tachment for an ordinary house cooking range or stove. However, it is to be understood that it may be employed in conjunction with any type of furnace.

As hereinafter described; my improved device includes a tubular air conduithaving means to rigidly secure it at an opening extending through an ordinary stove lid; said conduit carrying, at its inner end, a mixing retort with an air inlet and outlets, and having, at its outerr end, means,

adapted to afford a permanent air inlet port of predetermined size.

I am aware that ity is not broadly new to provide a stove lid with means to admit air therethrough. However, as ordinarily constructed, such devices serve to check combustion rather than to aid combustion; for the reason that unless the air .thus admitted is intimately mixed with the combustile primary products of combustion of the coal, and in such proximity to the coal that said products are at the proper temperature for reaction with the oxygen of the air; the latter merely cools said products and prevents their combustion; so that they pass to the flue merely diluted and unconsumed.

Moreover, such devices of the prior art, applied to stove` lids, interfere with the ordinary use of the stove in which they are embodied for the reason that they either` project above the lidso asto prevent placement of an ordinary tlatbottomed cooking utensil on the lid, or are so arranged that the air supplied through them cools the lid and thus prevents -itl from being used to heat such a cooking utensil, and many of the devices of the prior art have both those defects.

Therefore, it is an object and effect of my invention to provide such a coal gas carburetor as may be readily applied to an ordinary stove lid without lessening the ordinary utility of such a lid for supporting such cooking utensils and heating them incidentally leaving the outer ysurface of the lid in its normal continuously plane state and leaving the inner surface of the lid exposed to the heat from the tire, except ata negligibly small spot where the carburetor is attached. l

My invention includes the -various novel features of construction and arrangement hereinafter more definitely specied.

In said drawing; Fig. l is a plan view of an ordinary circular stove lid with a convenient embodiment of my invention applied thereto.

Fig. Il is a vertical transverse sectional view of the lid and carburetor shown in Fig. l, with a fragmentary sectional View of a portion of the stove or furnace casing adapted to support said lid.

In said figures.; the stove lid 1 is of the ordinaryy plane construction and includes the circumferential flanges 2 and 3 fitted to .the corresponding seat L1 in the stove or furnace wall plate 5, inclosing the fire chamber 6. l provide saidlid 1 with the central opening Y to receive the tubular screw 8 having the flat topped conical head 9, .flush with the outer plane surface of said lid 1; said head fitting a corresponding conical seat in said lid 1. Said screw 8 has the axial air passage 10 and forms a tubular air inlet conduit which rigidly connects said lid 1 with the screw threaded neck 11 of the retort 12. Said retort is conveniently formed as an oblate sphere.,

inclosing the mixing chamber 13 and may be formed of a single casting of iron, which lmay be alloyed with silicon and manganese in such proportions as to resist oxidation.

.Said retort 12 overhangs the re 14, as indicated in Fig. H, so as to extend within the gaseous primary products of combustion 15 arising from said fire. Said retort 12 has at its bottom, a circularv series of nozzles 17 which, as `shownin Fig. H, have respective cylindrical vente 18 outward-ly iared' at their outer ends. It may be observed thatI said vents 18 are in parallel relation with each other and with the axis of the tubular @air inlet'conduit 8.y ulflowever, they may be otherwise grouped and arranged. l also find it convenient to provide said retort 12 with thebatflefplate 20, in said chamber 13; which plate is substantially circular as indicated in Fig. ll, land prolo vided with the circumferential series of notches "21 througlrwhich "the air 'passes downwardly from said inlet passageway to said outlet nozzle vents 18. y

vStich bathe plates l2l() may be'jformed of stamped sheet, or cast inet-al primarily imbedded in 'any suitablev frangible "core sand compositioinf'whi'ch 'is cast in said retort 12 -to forni said chamber13 tlierleof5k'savid core composition subsequently shaken'out, andleaving said b'a'fie plate 20 loose in said lIenamber 13, as shown. banle plates are advantageously employed toinsure inti- Vinate Contact of the inflowfingl air with the hot metal walls` of said y' retort "before reachingfsaild nozzlevents 18. `jl'loweifrer,v

'it is to beunder's'tood that a Vcoal 'gas Icarburetor maybe madein'accordance with my l invention A without ysu'cli` a baffle plate.

"It is essential to the operation `ofiny inventlion1 forv the purpose herein Acontemplated that it shall soi'feed air into intimate mixture with the Igaseous.*'f'u'el productsras to' Ifacilitate 'further combustion of sucliprodl ucts, and that result is attain/edibynot only A preheating the air fin'sai'd retort 1`2which is pendent said chamber 6,-butby causing the air thus'prehea'ted to'be'lforcibly in yjec'ted, through said nozzle vents 18,- into: lthe flames arising from the coal. Of course, the

4o induction'of air throughsuch Yretorts A is ef fected by theordinary V'chimney draft ofthe i stoveorffurnacein which my invention is lembodied, but the. injection' of the .air in jets with the proper 'force yand in the proper direotion is due to the construction t'and arrangementof ysaid nozzles 'For in-` stance; if said nozzles were'omitted and the air permitted to merely'e'scape fromv said retort through apertures at thesides or top of Y' vthe latter, the air thus supplied to the ,fire chamber 6 mightinerely serve to 'lower the i temperature ofthe contents of the latter,

without facilitating combustion thereof; .be

cause of failure toiinix with the primary products of combustion in .the properplace and at the .proper temperature. l

vOf opiirse, the form-'fand proportion `'oflthe l A retort elements. VofY my invention should be ji nerniined by the construc'tionfand arrangefrom the essential features of my invention, as defined in the appended claims.

I claim:

il. The' combinationwith a plane stove lid; having an opening therethrough with a conical seat at the outer end of said opening;` of aA tubular air conduit having a flat slotted head at its outer end, iitted in said seat,j and screw threaded at its inner end; a retort, of oblate spheroid form, formed of a single casting, 'having a neck screw threaded to engage said tube, and rigidly connected by the latter to saidlid; said retort inclosing a -mixing chamber, supplied withairthrough said tube; said retort hav- 1'ing' afcir'cular series of nozzlesat the bottom thereof ywith. yvents extending therethrough; saidseri'es of vents being in .parallel relation with each other and'with the axis of said tube; and a Aloose circular battle plate, in said chamber, having a circumferential series `-ofnhtches in its ,perimeter arranged to directvthe `air flowing from said tube to Said nozzles in intimate contact with the wall fsaid' retort. t

2. The combination with a plane stove: lid;having an opening ltherethrough with a seat at the outer end of said opening; of a tubular lair conduit having a head at its louter end, fitted inV said seat, and screw threaded at its inner end; a retort, having a neck screw threaded to engage saidtube, and rigidly connected'I bythe latter to said lidg'said retort rinc'losing amixing chamber, 'suppli'edwith air through'said tube; said retortl'iavinga group of nozzles with vents eitending therethrough;rand a loose circular battle plate,"in"`said chamber, having a circumferential series of notches in its perimeter arranged .todirect the air flowing from v'said tube to said nozzles in intimate vcontact with the' wall offsaid retort.

3. i Thefcombination with a plane stove lid; ahaving an opening therethrough; ofza tubular 'air conduitfin said opening, having its outer end flush with said lid; a retort,formed1 of asingle castinghconnected to said tube, and'rigidly connected by the latter to said lid; said .retort inclosing a mixing chamber, supplied with air Athrough said tube; said retort having agroup of nozzles at thebot-` torn thereof with vvents extending there- `through;said series of vents being in paruallel relationwith each other and with the said'-ii'ozzles in intimate contact withfthe wall n n u v A H :liofisaidretort said vents being outwardly lernpjloyeil.y .y'lheref ore,I I do ffnot `desire/" to i JHnar-ed'fatftheir discharge ends.

"fe, vThe c'ombinatipn .wim h av plane stovelid h'avingfan opening therethrough of-a ltubujlarfyair` ,cenduit in; said; opening, having its t outer endfii'ush with-:said vlid gl a retort, con-f revenez. er

nected to said tube,a,nd rigidly connected by the latter to said lid; said retort inclosing n mixing chamber, supplied With air through said tube; said retort having a group of nozzles at the bottom thereof with" vents extending therethrough; and a circular bathe plate, in said chamber, khaving a circumferential series'or openings at its perimeter erranged to direct the air flowing from said tube to said nozzles in intimate contact with 10 the Wall of said retort.

In testimony whereof, I have hereunto signed my name at Philadelphia, Penne Sylvania, this 31st day of May, 1921.

HENRY SWARTZ.

Witnesses: t

MAURICE H. MATSINGER, J OSEPHINE M. RHODES. 

